Carrier 19XL - Manual (Page 145)

The starting torque potentiometer should be set so that when the PIC calls for the motor
to start, the rotor should just start to turn. The nominal dial position for a 60 Hz motor is
approximately the 11:30 position. The nominal dial position for a 50 Hz motor is approxi-
mately in the 9:30 position because the board is turned on its side, so that the 9:00
o’clock position is located where the 6:00 o’clock position would normally be located. The
ramp potentiometer should be set so that the motor is up to full speed in 15 to 20 sec-
onds, the bypass contactors have energized, and the auxiliary LCD is energized.
7. Proceed to apply power to the starter.
8. The Power +15 and Phase Correct LEDs should be on. If not, see the starter
Troubleshooting Guide section.
Click here for Figure 30 — Benshaw, Inc. Solid-State Starter Power Stack
Click here for Figure 31 — Ramp Up and Starting Torque Potentiometers